On 2022-01-25 11:12, LoyCurtis Smith wrote:
Would their mechanism included UHD based code?
Since UHD is the way ANY application talks to the radios, yes. But I
have no idea if OAI, as one of dozens and dozens of different appilcations
"out there" has any way to support that functionality.
Also, I assume that the only other option would be to purchase an
Octoclock or some other clock distribution module?
Yes, you'd need some kind of shared 10MHz reference clock and 1PPS
source, AND your application needs to be able to configure the radios to
use it.
On Tue, Jan 25, 2022 at 10:40 Marcus D. Leech
<[email protected]> wrote:
On 2022-01-24 20:53, LoyCurtis Smith via USRP-users wrote:
My system setup is as follows:
* 2 x USRP x310 with CBX-120 daughterboard
* 2 x Ubuntu 18.04 workstation
* 2 x Taoglas 45.8113 antenna
* 2 x Internal Reference Clock (Master Clock set at 184.32 MHz)
* 2 x Internal Time source
* 2 x Connected via 1 Gig-E interfaces
* 2 x Using UHD 4.1
The devices have been in two setups: stacked and a few inches apart.
I am attempting to deploy a 5G network using the openairinterface
(OAI) software system. Both devices synchronize initially, then
they fail. With openairinterface, I am using frequency offset
compensation at the UE. Its a useful parameter when running over
the air and/or without an external clock/time source
(https://gitlab.eurecom.fr/oai/openairinterface5g/blob/develop/doc/RUNMODEM.md)
Is there a way to synchronize the reference clock/timing of both
USRP x310s over the air? In the future, I will be attempting to
connect a third USRP x310. My setup will include one base station
and two user devices.
V/r
LoyCurtis Smith
Unless OAI provides some mechanism for that, the answer would be
no. You need a shared reference clock.
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V/r
LoyCurtis Smith
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